Barshen Border

This is my entry for Vim Jam 4 whose focus is Checkpoints and theme is Cross Paths. Story: You play as Gardor, guard robot armed with gun and axe. Your task is to prevent black invaders from passing through the check point you are guarding.  The invaders will either hide inside black boxes or directly walk/fly through the border. Destroy these black invaders on the spot! Control scheme: - Numpa…